the 90 AMP Harbor Freight titanium flux core wire feed welder.
the 90 AMP titanium unit for light occasional use might last a long time . It’s definitely not going to last long past when it’s fan dies. if you use it to its duty cycle daily multiple times a day I don’t see it lasting very long.
the reason I say that is the component I’ve labeled number three. It is a electrolytic bulk filter capacitor. Such capacitors are rated for hours at a given temperature. You can think of them like a paint can filled with in electrolytic solution that either evaporates or leaks out but once it’s gone so is the magic.
the metal on either side of it is a heat sink for switching component that makes the inverter welder. To me it looks like it was possibly designed to only last a set amount of time period usually you wouldn’t want that in between two big heat producers
there’s also not a lot of line filtering. Expect things like LED lights to flicker quite a bit.
that said it’s a great unit to use.